Aqueous antimicrobial composition

Abstract

[Problem to be Solved]An object of the present invention is to provide an aqueous antimicrobial composition which exhibits excellent antibacterial and antifungal activities even at a low concentration and has high safety, low skin irritation, and excellent long-term stability.[Solution]Aqueous antimicrobial compositions comprising two or more compounds selected from (a) benzoic acid or a salt thereof, (b) δ-gluconolactone, (c) ketonic acid or a salt thereof, and (d) sorbic acid or a salt thereof; and at least one or more dicarboxylic acid represented by General Formula (I) or a salt thereof.

The invention claimed is: 
     
       1. An aqueous antimicrobial composition comprising:
 (a) benzoic acid or a salt thereof, 
 (b) δ-gluconolactone, 
 (c) optionally a ketonic acid or a salt thereof, 
 (d) optionally sorbic acid or a salt thereof; and 
 (e) at least one dicarboxylic acids represented by General Formula (I) or a salt thereof:
   XOOC—R—COOX   (I)
 
 
 wherein R represents a bond; or a C1-C8 alkylene group, a C1-C8 alkenylene group or a C1-C8 alkynylene group; and X represents a hydrogen atom or an alkali metal. 
 
     
     
       2. The aqueous antimicrobial composition according to  claim 1  comprising at least one of sulfurous acid or a salt thereof, pyrosulfurous acid or a salt thereof, thiosulfurous acid or a salt thereof, dithionous acid or a salt thereof, and phosphoric acid or a salt thereof. 
     
     
       3. The aqueous antimicrobial composition according to  claim 1 , wherein the pH is 2.4 to 5.5. 
     
     
       4. The aqueous antimicrobial composition according to  claim 1 , wherein the dicarboxylic acid or the salt thereof is a malonic acid or a salt thereof. 
     
     
       5. The aqueous antimicrobial composition according to  claim 1 , comprising (a) 0.01-0.3 mass % of benzoic acid or a salt thereof, (b) 0-0.5 mass % of β-gluconolactone, (c) 0-0.2 mass % of a ketonic acid or a salt thereof, (d) 0-0.2 mass % of sorbic acid or a salt thereof, and (e) 0.01-0.3 mass % of at least one or more of dicarboxylic acids represented by General Formula (I) or salts thereof. 
     
     
       6. A wet wipe comprising the aqueous antimicrobial composition according to  claim 1 . 
     
     
       7. The wet wipe according to  claim 6 , wherein the aqueous antimicrobial composition has a pH of 4.0 to 6.5.